Clock



FIG. 1 is a perspective view of the clock.

FIG. 2 is a front view of the clock.

FIG. 3 is a rear view of the clock.

FIG. 4 is a left side view of the clock.

FIG. 5 is a right side view of the clock.

FIG. 6 is a top view of the clock; and,

FIG. 7 is a bottom view of the clock. 

The ornamental design for a clock, as shown and described. 